boys. i always worry about them getting into sports like hockey and football. this study looked at repeated trauma, but not necessarily repeated concussions because i think a lot of people think, yeah, if you get a lot of concussions, you're going to have a lot of problems, but maybe not so much. just the constant -- see what a linebacker goes through all the time. repeated, you know, traumz that may not send you off to the sick bed. >> exactly. that's an excellent point. it doesn't have to be repeated huge things that put you in the hospital, and what's interesting is that the first sign of cte can be very subtle. the b.u. researcher was telling me it might be something like just a personality change. perhaps people do things more impulsively than they ordinarily would, and sometimes it's just chalked up to, oh, you know, he is just a guy being a guy, when, in fact, it might be the affects of cte. the value of this study is that they get to see it over time. i mean, these people were 17 into 98. the yuckest patient was 17.